package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.properties.WeChatProperties;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.bridge.Message;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil  weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer  webSocketServer;
    private Orders orders;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        // 处理业务异常
            // 地址簿为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null){
                // 抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
            // 购物车为空
        Long userId=BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder().userId(userId).build();
        List<ShoppingCart> shoppingCarts=shoppingCartMapper.list(shoppingCart);
        if(shoppingCarts==null || shoppingCarts.size()==0){
                // 抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        // 向订单表插入1条数据
            // 封装数据
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
            // 订单时间
        orders.setOrderTime(LocalDateTime.now());
            // 支付状态
        orders.setPayStatus(Orders.UN_PAID);
            // 订单状态
        orders.setStatus(Orders.PENDING_PAYMENT);
            // 订单号                     当前系统时间
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
            // 用户的手机号
        orders.setPhone(addressBook.getPhone());
            // 收货人
        orders.setConsignee(addressBook.getConsignee());
            // 用户ID
        orders.setUserId(userId);

        this.orders=orders;
            // 插入
        orderMapper.insert(orders);
        // 向订单明细表插入n条数据
            // 存放所有订单明细对象
        List<OrderDetail> orderDetailList=new ArrayList<>();
            // 遍历购物车
        for(ShoppingCart cart:shoppingCarts){
                // 订单明细对象
            OrderDetail orderDetail=new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
                // 设置订单明细 关联的 订单ID
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
            // 批量插入
        orderDetailMapper.insertBatch(orderDetailList);
        // 清除购物车数据
        shoppingCartMapper.deleyeByUserId(userId);
        // 封装VO
        OrderSubmitVO orderSubmitVO=OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
        JSONObject jsonObject = new JSONObject();

        jsonObject.put("code", "ORDERPAID");

//


        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);

        vo.setPackageStr(jsonObject.getString("package"));



        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改

        Integer OrderPaidStatus = Orders.PAID; //支付状态，已支付

        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单


        //发现没有将支付时间 check_out属性赋值，所以在这里更新

        LocalDateTime check_out_time = LocalDateTime.now();


        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orders.getId());
        // 支付完成后,向客户端推送消息
        Map map=new HashMap();
        map.put("type",1);  // 1-来单提醒,2-客户催单
        map.put("orderId",orders.getId()); // 订单ID
        map.put("content","订单号:"+ordersPaymentDTO.getOrderNumber()); // 提示内容

        String json = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(json);
        return vo;

    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 订单历史
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult history(Integer page, Integer pageSize, Integer status) {
        // 设置分页插件
        PageHelper.startPage(page, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> orders=orderMapper.page(ordersPageQueryDTO);
        List<OrderVO> list=new ArrayList<>();
        if(orders != null && orders.size()>0){
            for (Orders order : orders) {
                Long id=order.getId();
                // 订单明细
                List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(id);

                OrderVO orderVo=new OrderVO();
                BeanUtils.copyProperties(order,orderVo);
                orderVo.setOrderDetailList(orderDetailList);

                list.add(orderVo);
            }
        }
        return new PageResult(orders.getTotal(), list);
    }

    /**
     * 订单详情
     * @param orderId
     * @return
     */
    @Override
    public OrderVO orderDetail(Long orderId) {
        Orders order=orderMapper.getById(orderId);

        // 查询该订单定义的菜品/套餐明细
        List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(orderId);

        // 封装
        OrderVO orderVo=new OrderVO();
        BeanUtils.copyProperties(order,orderVo);
        orderVo.setOrderDetailList(orderDetailList);
        return orderVo;
    }

    /**
     * 取消订单
     * @param id
     */
    @Override
    public void orderCancel(Long id) throws  Exception{
        // 根据ID查询订单
        Orders order=orderMapper.getById(id);

        // 订单是否存在
        if(order==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 订单状态错误
        if(order.getStatus() > Orders.TO_BE_CONFIRMED){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders=new Orders();
        orders.setId(order.getId());
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void orderCancel(OrdersCancelDTO ordersCancelDTO) throws Exception{
        // 获取订单对象
        Orders orders=orderMapper.getById(ordersCancelDTO.getId());
        // 装配参数
            // 订单取消原因
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
            // 订单状态
        orders.setStatus(Orders.CANCELLED);
            // 支付状态
        orders.setPayStatus(Orders.REFUND);
            // 订单取消时间
        orders.setCancelTime(LocalDateTime.now());
        // 更新
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 当前用户ID
        Long userId = BaseContext.getCurrentId();

        // 根据ID查询当前订单详情
        List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象、
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(
                x->{
                    ShoppingCart shoppingCart = new ShoppingCart();

                    // 将原订单详情里面的菜品信息重新复制到购物车对象中
                    BeanUtils.copyProperties(x, shoppingCart, "id");
                    shoppingCart.setUserId(userId);
                    shoppingCart.setCreateTime(LocalDateTime.now());

                    return shoppingCart;
                }
        ).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 统计各个状态的订单数量
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders order=orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (order == null || !order.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(order.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        // 更新
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception{
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        // 更新
        orderMapper.update(orders);
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders order = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        // 更新
        orderMapper.update(order);
    }

    /**
     * 派送
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders order=orderMapper.getById(id);
        // 校验订单是否存在，并且状态为3
        if (order == null || !order.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(order.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        // 设置分页插件
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> orders=orderMapper.page(ordersPageQueryDTO);
//        orders.forEach(order->{
//            List<OrderDetail> orderDetails=orderDetailMapper.getByOrderId(order.getId());
//            List<String> orderDishs=new ArrayList<>();
//            orderDetails.forEach(orderDetail->{
//                orderDishs.add(orderDetail.getName());
//            });
//            String result=String.join(",",orderDishs);
//            order.setOrderDishes(result);
//        });
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(orders);
        return new PageResult(orders.getTotal(), orderVOList);
    }

    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders order=orderMapper.getById(id);

        // 校验订单是否存在
        if (order == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 封装提醒数据
        Map map=new HashMap();
        map.put("type", 2); // 1-来单提醒,2-客户催单
        map.put("orderId", id);
        map.put("content", "订单号:"+order.getNumber());
        String json = JSON.toJSONString(map);
        // 推送消息
        webSocketServer.sendToAllClient(json);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join(",", orderDishList);
    }
}
